/Engine/Source/Runtime/Engine/Classes/Components/SkeletalMeshComponent.h
Computes the required bones in this SkeletalMeshComponent based on current SkeletalMesh, LOD and PhysicsAsset
void ComputeRequiredBones ( [TArray](API\Runtime\Core\Containers\TArray)< FBoneIndexType > & OutRequiredBones, [TArray](API\Runtime\Core\Containers\TArray)< FBoneIndexType > & OutFillComponentSpaceTransformsRequiredBones, int32 LODIndex, bool bIgnorePhysicsAsset ) const